But Williams, 31, says she wasn't the only one immersed in the world of the iconic actress during the production of My Week with Marilyn – especially around nighttime.

While accepting best-performance honors for her role in the movie at Sunday night's Golden Globe Awards (live from the Beverly Hilton Hotel), Williams singled out her daughter from her relationship with Heath Ledger, 6-year-old Matilda Rose, whom she praised for "suffering through six months of bedtime stories, where all the princesses were read aloud in a Marilyn Monroe-[sounding] voice."